Goodman Gas Furnace GMSS920402BNAA

Ensure all other gas appliances are turned off

Wait for at least fifteen minutes after the heating cycle has started

Record the time taken for one complete revolution of the cubic foot dial on the gas meter (in seconds)

Enter the calorific value of the gas (BTU per cubic foot)

Calculate the cubic feet of gas consumed per hour using the gas rate chart

Calculate the BTU input by multiplying the cubic feet of gas consumed per hour by the calorific value

Disconnect all power before servicing or installing the unit.

Check the following furnace components for proper working order

Is the ignitor being handled by a qualified servicer?

Handle the ignitor with care, avoiding touching the ignitor body with bare fingers.

Were all necessary repairs or services performed?

Connect a monometer to the outlet tap at the gas valve before adjusting the pressure regulator.

Measure the current manifold pressure.

Is the manifold pressure within the acceptable range (3.5 inches water column for natural gas or 10 inches water column for propane gas)?

Adjust the pressure regulator direction

Re-measure the manifold pressure after adjustment.

Is the final manifold pressure within plus or minus 3 inches water column of the target pressure?

Propane Gas Specific Instructions

Turn on the furnace at the thermostat

Wait a few minutes for dislodged dust to settle

Check the burner flames for the following characteristics

Are the flames stable, quiet, soft and blue with slightly orange tips?

Are the flames extending directly outward from the burner ports without curling downward, floating or lifting off the ports?